Ahhhh, one second interval is more like it. RadioShack: Catalog #: 276-036 Specs are limited. AKA: F336HD (Obsolete component) http://www.radioshack.com/product.asp?catalog%5Fname=CTLG&category%5Fname=CT LG%5F011%5F006%5F002%5F000&product%5Fid=276%2D036#
http://www.datasheetarchive.com/semiconductors/specsheet.php?specsheet=73979 8 F336HD Applications: http://members.aol.com/dswart/tables.html Some empirical test data using this LED. http://www.edn.com/archives/1997/060597/12di_07.htm http://www.edn.com/archives/1997/112097/24di_04.htm You may have to 'cherry pick' from a few of these to get one close to your blink-rate preference. Closest thing I could find to a spec says anywhere from 0.5 to 3.0 Hz is to be expected. Other possibilities: http://www.mouser.com/catalog/623/53.pdf http://www.newark.com/product-details/text/catalog/80671.html (Rated 5 to 12V, but may work at 3V) Lumex (Digikey): SSL-LX5093BHD Specs are sketchy. http://wolfstone.halloweenhost.com/HalloweenTech/anebuy_BuyLEDEyes.html http://www.vishay.com/docs/83000/83000.pdf Gee! Real specifications. http://www.vishay.com/leds/list/product-83000/ http://www.datasheetcatalog.com/microelectronics/19/ _jim -----Original Message----- From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] Behalf Of joeuser Sent: Sunday, August 28, 2005 3:14 PM To: The Hardware List Subject: Re: [H] Weird one for you... inline... nobozoz wrote: > How badly do you want/need this? Be nice to have one... but something will come along... > > The problem really boils down to the one minute flash period. There are > plenty of LEDs with fixed timing between 0.5 Hz and 2 Hz +/-25% flash rate - > they're everywhere. Very much slower than this and you are talking about a > much smaller market coupled with more expensive timing components like CMOS > counters, large capacitors (C > 1 uF) and large resistance values. And, you > want it to be power-efficient as well. I'm sorry I meant to write one second flashes... or thereabouts. > > I can see something like a small circuit board with 3 to 7 components > (including the LED of your choice) and an external battery holder with wire > leads. Yeah. > > Price-wise, maybe $10 to $60 in pre-designed kit form depending on how close > to your performance expectations you can afford. I suppose the cost would change based on the flash requirement? > > I could probably design & build one of these myself out of stuff from > RadioShack and my garage, but I don't have the time. I just want to buy one pre made. -- Cheers, joeuser (still looking for the 'any' key)
